Sight for ordnance.



No. 642,670. Patented Feb. '6, I900.

w. H. BEJANS.. SIGHT FGR QRDNANCE.

5 Sheets-Sheet I NVE R WITNESSES ATTORNEY.

- Patented Feb. 6, I900. w H. BEVANS. SIGHT FOR ORDNANCE.

7 (Application filed may 12 1898.) I

5 Sheets-Sheet 2.

(No Model.)

MW T M Q 1 i WITNESSES N0. 642,670. Patented m. 5, I900. w H BEVANSSIGHT FGR DBDNANGE.

n filed May 12 1898) 5 Sheets-sheaf 3.

(No Model.)

' //v VENTOI? u f. @WW

New 642,670. I v Pat ented l ob; 6, 1900.,

. w. H. BEVANS. I

-SIGHT FOR ORDNANCE.

(Application filed May 12. 1898.) (No Model.) 5 shga ta sheet 4.

WITNESSES: INVENTOI? Np. 642,670. Patented Feb. 6, I900.

w. BEVANS. SIGHT FOR URDNANCE.

(Application filed May 12, 1898.)

(H Model) 5 Sheets-Sheet 5.

WITNESSES l/v VEN T0}? V V- M ATTORNEY.

States tides;

*Atr' BEVANS, OF WASHINGTON, "DISTRICT oh comm ism.

sleet Foe RDNANQEQ pert ofLetters emetic. 642,670, dated February 6,reoo. Appllcation filedtlay12,1893. Serial 1%. 680,444. (No model.) .1

' To whom, 2 2? may concern: mounted upon said supporting-plate throughBe it known that I, W'ILLIAi/i H. BEVANS, the -medium of the trunnions5, projecting citizen of the United States, residingat Washfrom atru'uniomband' 6, secured about the 55 ington, District of Columbia,have invented body or main tube-of the telescopeend e11- certain new anduseful Improvements in gaging said trunnion-bearings,-in which they Sidi for Qrdnance; andl do hereby declare arerctained hycaps 7. A shaft8isthreaded wihg to be full, clear, and exact into boss 3 end at its outerend is reduced -11 of the invention, such as will enand threaded, as at9, and at the inner end 60 rs skilled in theart to which it apofsaid'threaded portion formed with an em to make and use the same. nularshoulder- 10." lis invention relates to sights for ord- Mounted uponshaft 8 is an elevating disk ance; the gorimary object thereof is to ordrum 11, the hub of which is counterbored do an improved mechanismwhereby the to receive shoulder 10 ofseid shaft. A suit- 65 t maybequickly and accutatel'yadjusted' able clamping-nut 12 is provided uponthe 15 to minimize the numberfof' perts emthreaded end of the shaft hhdis adapted to 'pioyed in such mechanisms, th'ussimplifying lock the drumor disk from movement upon effecting a reduction in weight said shaftafter the sight has heenadjusted. cost of manufacture. Q Formed in saiddisk or drum, about the con-- 70, r ilieinvention-elseconsistsineesteio. otheritertthereof,isas iralslota13,:intomhichprm. eimprovements, which will be fully 'setforth jectis a pin 14, carriedbyen,elevatingband is the following specification, particularly 15, alsosecured upon the body of the telepointed out in the claimsgand clearlyillusscope. This pin projects fromalaterallyex- 2*" deal by theaccompanying drawings, ihrtending lug .16 upon said elevating-band, 75kill?" which lug is formed.with a fist bearing-surnre 1 isa top planview of myimproved face engaging the inner face of the drum or sight inpesitionupon the trunnion of a gun. disk, while a similar lug 17 isformed on the i efside elevation of the same- Fig. 3 opposite side ofthe elevating-band,-the bearis transverse sectional view takenonthe'line lug-surface of which engages a vertical guide-18o t?) of Fig.4 ice similar view taken on extension 18, formed on thesupporting-plate. liney of the sazhe figure. Fig. 5 is a top "Thus-asthe telescope is elevated and. deplan view showing my sight providedwithpressed it is guided in its movement by the means for sheetingthe-lateral adjustment engagement of said'lugs with'the inner face eof.Fig. 6 isa elevation of'theLJof the diskand guide extension. The elevat-85 ig.-7 is transverse sectional view 'ing disk or drum. isprovidedabout the outer 3 5 o of 5. Fig. 8'is a si'milariview edge of the spiralslot with a scale, the gradthe line got the some figure. s Fig.uations'of which are brought-into coincidence) lan. view with thetelescope and with an index or pointer upon the end of pin e 'ihg-frumremcyed. Fig-H10 is a side Mas said diskor drum is rotated. I 0 I f ionotthe same. 1 11,When it is desired to adjust the telescope o 1' ve ilustrated and described my'inv'ento ih'sure the'proper elevati'onof thegun for l M is "the fieseet insmsce lnioonnectioh" *a'meb'ject attar-distance of,say,i-two thousand with that class of sights known astelescope-f yards, the elevating disk or drum is rotated, sights, outdonot desire to limit the sameto. its per' hery being milled to facilitatethe .95 that class, as it is equally applicable to other same, ntil thetwo thousand yards gradw forms of sights. potion of the scalecoinoideswith the index Referring now more particularly to Figs. upon the pin,when the sight will be elevated 1 2, 3, and e of the drawings, 1designates a the requisite number of degrees. Thus it willsupporting-plate having the laterally-extend i be seen that theelevation and depression of mo leg trun ieh-beerings Zformed atone'endthe telescope-are effected throughthe coaction thereof and at itsopposite end the laterall'yofthe pin carried thereby and the'spiral slotextending hose 3. A. telesoope l, suchas is of the elevatingdisk. Owingto the fact that ordinarily in telescope-sights, is pivotally the pincarried by the sight is at all times above the axis of theelevating-disk the weight of the sight will cause the same to beretained in its adjusted position without the use of the clamping-nut,the latter not being essential, but provided as a safeguard topositively lock the sight from any movement which might possibly occurfrom the shock or vibration incident to the firing of the gun to whichit is attached.

Through the medium of the spiral elevatingslot an increasedscale-surface is provided, so that the graduations may be placed quite adistance apart, thus permitting the sight to be quickly and accuratelyadjusted by facilitating the reading of the scale and necessitating aconsiderable movement of the elevating-disk to elevate or depress thetelescope a single degree.

For attaching the sight to the gun I place at any suitable and preferredposition upon the latter (it being illustrated in the present instanceas positioned upon the trunnion of the gun) a bracket 10,having anopen-ended dovetailed groove formedtherein and secure to or formintegral with the supporting-plate a dovetailed plate 20, which slidesin the groove of the bracket, thus positioning the sight upon the gun.The supporting-plate is formed with a hollow boss 21, which opensthrough the dovetailed plate and in which a plunger is positioned, thesame being held normally projected from said plate by a coiled spring'within the boss. The projecting end of this plunger enters an openingformed in the bracket as the sight is positioned upon the gun, and inremoving the sight from the gun the plunger is retracted, it beingprovided with a suitable knob for that purpose. It will be noticed thatthe face of the dovetailed plate 20 is inclined,and the sameis so formedfor the purpose of giving the sight the proper set in order tocompensate for the drift or lateral deviation of the gun.-

In Figs. 5 to 10, inclusive, my improved sight is shown provided with alateral ad justment in addition to the vertical adjustment beforedescribed, and through the medium of this construction the sight may beadjusted laterally and also be readjusted to proper position withrespect to the gun should it become accidentally displaced fromanyeause. 1

In the sight illustrated in said figures the supforting-plate isprovided at its upper edge with a laterally-projecting shelf 23, uponwhich trunnion bearings 2 are swiveled throughthe medium of a pivot pinor stem 24, depending centrally from said bearings and having itsbearings in the shelf, through which it depends-and receives a nut 25 onits projecting end. An arm 26 extends rear- Wardly from thetrunnion-bearings, and upon this arm, adjacent to its free end, the boss3 is formed, which carries the shaft of the ole vating-drum. Themounting of the telescope upon the trunniombearings and the mechanismfor elevating and depressing it have been described hereinbcfore, theonly difference in construction between the sight first described andthe one now under consideration being the slight change incident to theswiveling of the telescope and its elevating and depressingmechanism tothe supporting-plate. A pin 27 depends from the free end of the arm 26and moves in a curved slot 28, formed in the shelf, and is provided uponits projecting end With a clam ping-nut 29, whereby the telescope may belocked in its adjusted position. A boss 30 is raised about said slot,upon which said arm moves, and a scale may be provided thereon withwhich an index upon the arm may coact, so that the telescope may bereadily adjusted the desired number of degrees to the right or left.

It will be apparent that the lateral movement of the telescope could beeffected in a number of different ways other than that here shown anddescribed-as, for instance, through the medium of a rack and pinion andI therefore do not desire to limit my invention to the details ofconstruction herein set forth for accomplishing such adjustment.

The guide extension, which guides the telescope in its elevation anddepression, is'car ried by the inner end of the drum-shaft boss insteadof being formed on the supportingplate, as in the first constructiondescribed.

The mounting of the sight upon the gun has been hereinbeforedescribed,,the plunger 22 in the present instance being located belowthe rearwardly-extending arm, so that ready access is afforded to theknob for retracting the same. The dovetailed plate, however, is notinclined in the present construction but the proper set of the sight to-I compensate for the lateral deviation of the gun is provided for byforming the trunnionbearings at an angle to the stem or pivot-pinthereof, so that the sight is not only supported at the necessary angleto the gun, but the 5 axis thereof retains the same relative positionwith respect to the gun throughout the la"- eral movement of the sight,which would not :be the case were the supporting-plate and shelf set atan inclination, in which event the Y axis of the sight would rise orlower during lateral movement.

As stated at the beginning of the speeifi cation, the constructiondescribed and illustratedis not limited to use upon telescopesights, andit will" be apparent that a sight bar might be readily substituted forthe tele-' scope without materially altering the detailsof constructiomHaving thus fully described my invention,

j what i claim as new, and desire to secure by Letters Patent of theUnited States, i-s

1. In an adjustable sight for ordnance, the combination with anelevating, member formed with a earn-surface and having a scalefollowing the contour of said surface; of an elevating member engagingsaid surface and I carrying an index enacting with saidscale,

snbstantiaiiy as described.

642,670 I I a 1 2. In an adjustable sight-for ordnance, the combinationwith an elevating member formed with a spiral elevating-surfaceand'having a scale following the contour of said surface, of an elevatingmember engaging said spiral surface and-carrying an indexcoa acting withsaidscale, substantially as described. I

combination with an elevating member formedwith a cam-surfaceandhavingascale ,placed alongtheedgethereof, .ofameleyating.

member engaging said cam-surface and carrying an index coactingwith saidscale, sub stautially as described. i l v i 4. In an adjustable sightfor ordnance, the combination with anelevating-drum formed with acam-elevating surface and having a scale following .the contour of saidsurface, of an elevating member engaging said cam-surface and carryingan index coacting with said scale, substantially as described.

5. In an adjustable sight for ordnance, the combination with anelevating-drum formed with a cam-elevating surface and having a scalefollowing the contour of said surface, of an elevating'member carried bythe sight engaging-said surface and provided with an index coa'ctingwith the scale, substantially. as

I I described.. 3. In an adjustable sightfor ordnance, that.

combination with an elevating member 7 formed with a cam-slot and havinga scale ar-- rangedalong theredge thereof, of. an velevat- 6. .In'anadjustable sight for ordnance, the

ing member projecting into said slot and carrying an index coajctingwith said scale, substantially as described.

In testimony whereof I afii-x my signature in presence of twowitnesses.-

- ,WILLIAM H. BEVANS.

Witnesses:

W. W. KEBLINGER, H. C. SHERIDAN.

